I know I was a good kid in school. Great grades, no trouble-- but I have no memory of that. I was told that, at some point, I changed. I suddenly didn't want to do anything with school, something I can assume is perfectly normal, but not remembering anything until I was 16 isn't.
I do remember saying "it wasn't me," even if he body did it. I wish I had some examples from that time, but there are plenty of writings (and more) to attest to that now.
I also started to wonder if I had ADD or bipolar at points (turned out to be dissociation and influence from alters), and that fact reinforced my belief that I have DID.
-Jeff